For those of you that enjoy castles here is another castle that is created through a single command block. This castle also comes with its own moat. I have deliberately excluded windows, bars, and interior floor allowing you to fully customize it to your liking. I hope that you enjoy it and appreciate your feedback. Copy the code below. paste it into a command block and activate with redstone.

Please make sure you copy the entire code. It is this line specifically ([{id:falling_block,Block:command_block,Time:1,TileEntityData:{Command:"/fill ~ ~-75 ~-1 ~ ~80 ~-1 redstone_block"},Passengers:[{id:falling_block,Block:redstone_block,Time:1}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}") that adds the redstone, and each line creates its separate command block.